Augustine of Hippo
Catena Aurea · Johannesevangelium 18
Judas then, having received a band of men and officers from the chief priests and Pharisees, cometh thither with lanterns and torches and weapons. Jesus therefore, knowing all things that should come upon him, went forth, and said unto them, Whom seek ye? They answered him, Jesus of Nazareth. Jesus saith unto them, I am he. And Judas also, which betrayed him, stood with them. As soon then as he said unto them, I am he, they went backward, and fell to the ground. Then asked he them again, Whom seek ye? And they said, Jesus of Nazareth. Jesus answered, I have told you that I am he: if therefore ye seek me, let these go their way: That the saying might be fulfilled, which he spake, Of them which thou gavest me have I lost none.
(Tr. cxii) They had heard at the first, I am He, but had not understood it; because He who could do whatever He would, willed not that they should. But had He never permitted Himself to be taken by them, they would not have done indeed what they came to do; but neither would He what He came to do. So now having shewn His power to them when they wished to take Him and could not, He lets them seize Him, that they might be unconscious agents of His will; If ye seek Me, let these go their way.